Greetings…
Well, like others… my favourite Magic System is Ars Magica. A system general enough that you could choose the effects you wanted for any particular task, known as spontaneous spells. Also, the system had 'pre-generated' or formulaic spells. So if you weren't in the mood, or in the frame of mind to create spells, casting a 'known' spells was the way to go. Not to mention it was easier.
As to send this thread off course...
Umbran said:
My absolute favorite magic system is that seen in Mage: The Ascension, from White Wolf. I have been told it is very similar to Ars Magica, but not having played that game or read the rules, I cannot speak to the point.
Like Mage, Ars Magica is a 'skill-based' system, as well as being a 'generalist' system. But where Mage uses modern terms and ideas, where you look at the sphere to do something for you (along with preprequisties in other spheres). Ars Magica uses a noun-verb combination system, that generalizes it even more. Effectively, Mage just groups everything into the nine spheres, and drops the verb component.
For example, in Mage if I were to create something. I would use Matter, or Prime. To give this creation life, I would need Spirit or Life.
In Ars Magica, I would first have to figure out what I was making. A golem? I would have to 'create' 'earth', having a certain amount of 'life', either it be 'human' or 'animal' life-force, to be able to throw into the spell.
[sblock]http://en.wikipedia.org/wiki/Ars_Magica#System
There are 15
Arts divided into 5
Techniques and 10
Forms. The Techniques are what one does and the Forms are the objects one does it to or with. This is sometimes called a "Verb/Noun" magic-system. The Arts are named in Latin.
Thus,
Creo Ignem spells create fire (and the normal effects of fire, such as heat or light);. a
Perdo Ignem spell may drop the temperature in a room. A typical
Perdo Imaginem spell is granting invisibility to the caster by making one's image disappear.
Rego Aquam could turn water into an unusual, but natural form (e.g. creating a pillar of water), while
Muto Aquam could turn change the nature of water into, for example, oil or wine. An
Intellego Mentem spell may permit the caster to understand any language; and so on... A mage's skill when casting a spell is the sum of their scores in the appropriate technique and form.
If a spell involves more than one technique, or more than one form, this is known as a
requisite; The lowest technique and form are used. For example, turning a person to stone would involve
Muto, Corpus and
Terram; The player would add the character's Muto score to the lower of their Corpus and Terram scores.
By combining these techniques and forms, the magi may achieve any effect and spontaneously cast a spell with that desired effect. However, there are often severe limits to the level of power a magi can generate by casting spontaneously, and so he may also choose to learn a spell with that desired effect.[/sblock]